| Message ID | 20230328022733.29910-7-tinghan.shen@mediatek.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add support for MT8195 SCP 2nd core | expand |
On Tue, Mar 28, 2023 at 10:27:28AM +0800, Tinghan Shen wrote: > The difference of single-core SCP and multi-core SCP device tree is > the presence of child device nodes described SCP cores. The SCP > driver populates the platform device and checks the child nodes > to identify whether it's a single-core SCP or a multi-core SCP. > > Add the remoteproc instances for single-core SCP and multi-core SCP to > the new added SCP cluster list. When the SCP driver is removed, it > cleanup resources by walking through the cluster list. > > Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com> > --- > drivers/remoteproc/mtk_common.h | 3 + > drivers/remoteproc/mtk_scp.c | 150 ++++++++++++++++++++++++++++---- > 2 files changed, 137 insertions(+), 16 deletions(-) > > diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h > index c0905aec3b4b..b73b60c22ea1 100644 > --- a/drivers/remoteproc/mtk_common.h > +++ b/drivers/remoteproc/mtk_common.h > @@ -128,6 +128,9 @@ struct mtk_scp { > size_t dram_size; > > struct rproc_subdev *rpmsg_subdev; > + > + struct list_head elem; > + struct list_head *cluster; > }; > > /** > diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c > index 32ecd1450c6f..71882ed31e16 100644 > --- a/drivers/remoteproc/mtk_scp.c > +++ b/drivers/remoteproc/mtk_scp.c > @@ -30,6 +30,8 @@ struct mtk_scp_of_regs { > phys_addr_t l1tcm_phys; > }; > > +static struct list_head cluster_cores; > + See my comment in the previous patch about this. > /** > * scp_get() - get a reference to SCP. > * > @@ -863,7 +865,8 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp) > } > > static int scp_rproc_init(struct platform_device *pdev, > - struct mtk_scp_of_regs *of_regs) > + struct mtk_scp_of_regs *of_regs, > + const struct mtk_scp_of_data *of_data) > { > struct device *dev = &pdev->dev; > struct device_node *np = dev->of_node; > @@ -884,7 +887,7 @@ static int scp_rproc_init(struct platform_device *pdev, > scp = (struct mtk_scp *)rproc->priv; > scp->rproc = rproc; > scp->dev = dev; > - scp->data = of_device_get_match_data(dev); > + scp->data = of_data; > platform_set_drvdata(pdev, scp); > > scp->reg_base = of_regs->reg_base; > @@ -934,10 +937,6 @@ static int scp_rproc_init(struct platform_device *pdev, > goto remove_subdev; > } > > - ret = rproc_add(rproc); > - if (ret) > - goto remove_subdev; > - > return 0; > > remove_subdev: > @@ -952,6 +951,109 @@ static int scp_rproc_init(struct platform_device *pdev, > return ret; > } > > +static void scp_rproc_free(struct mtk_scp *scp) > +{ > + int i; > + > + scp_remove_rpmsg_subdev(scp); > + scp_ipi_unregister(scp, SCP_IPI_INIT); > + scp_unmap_memory_region(scp); > + for (i = 0; i < SCP_IPI_MAX; i++) > + mutex_destroy(&scp->ipi_desc[i].lock); > + mutex_destroy(&scp->send_lock); > +} > + > +static int scp_cluster_init(struct platform_device *pdev, > + struct mtk_scp_of_regs *of_regs) > +{ > + struct device *dev = &pdev->dev; > + struct device_node *np = dev_of_node(dev); > + struct platform_device *cpdev; > + struct device_node *child; > + const struct mtk_scp_of_data **cluster_of_data; > + struct list_head *cluster = &cluster_cores; > + struct mtk_scp *scp, *temp; > + int core_id = 0, num_cores; > + int ret; > + > + child = of_get_next_available_child(np, NULL); > + if (!child) > + return dev_err_probe(dev, -ENODEV, "No child node\n"); > + > + of_node_put(child); > + if (of_node_name_eq(child, "cros-ec-rpmsg")) { > + dev_dbg(dev, "single-core scp\n"); > + > + ret = scp_rproc_init(pdev, of_regs, of_device_get_match_data(dev)); > + if (ret) > + return dev_err_probe(dev, ret, "Failed to initialize single-core scp\n"); > + > + /* the single-core drvdata is intended to be the mtk_scp object. > + * the mtk_scp object is used by APIs in mtk_scp_rpmsg_info. > + */ > + scp = platform_get_drvdata(pdev); > + list_add_tail(&scp->elem, cluster); > + scp->cluster = cluster; > + } else { > + dev_dbg(dev, "multi-core scp\n"); > + > + cluster_of_data = (const struct mtk_scp_of_data **)of_device_get_match_data(dev); > + > + num_cores = of_get_available_child_count(np); > + > + for_each_available_child_of_node(np, child) { > + if (core_id >= num_cores || !cluster_of_data[core_id]) { The first part of the if() condition is not needed - please remove. > + ret = -EINVAL; > + dev_err(dev, "Not support core %d\n", core_id); > + of_node_put(child); > + goto init_fail; > + } > + > + cpdev = of_find_device_by_node(child); > + if (!cpdev) { > + ret = -ENODEV; > + dev_err(dev, "Not found platform device for core %d\n", core_id); > + of_node_put(child); > + goto init_fail; > + } > + > + ret = scp_rproc_init(cpdev, of_regs, cluster_of_data[core_id]); > + if (ret) { > + dev_err(dev, "Failed to initialize core %d rproc\n", core_id); > + put_device(&cpdev->dev); > + of_node_put(child); > + goto init_fail; > + } > + scp = platform_get_drvdata(cpdev); > + list_add_tail(&scp->elem, cluster); > + scp->cluster = cluster; > + put_device(&cpdev->dev); > + > + core_id++; > + } > + } > + > + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { > + ret = rproc_add(scp->rproc); > + if (ret) > + goto add_fail; > + } > + > + return 0; > + > +add_fail: > + list_for_each_entry_continue(scp, cluster, elem) { > + rproc_del(scp->rproc); > + } > +init_fail: > + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { > + list_del(&scp->elem); > + scp_rproc_free(scp); > + } > + > + return ret; > +} > + > static int scp_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > @@ -980,21 +1082,30 @@ static int scp_probe(struct platform_device *pdev) > scp_regs.l1tcm_phys = res->start; > } > > - return scp_rproc_init(pdev, &scp_regs); > + ret = devm_of_platform_populate(dev); > + if (ret) > + return dev_err_probe(dev, ret, "Failed to populate platform devices\n"); > + > + INIT_LIST_HEAD(&cluster_cores); > + platform_set_drvdata(pdev, &cluster_cores); Why is this needed when @cluster_cores is a global variable??? The drvdata should be the cluster I talked about in the previous patch. Doing this will greatly simplify this patchset. I will stop here for this revision. Thanks, Mathieu > + > + ret = scp_cluster_init(pdev, &scp_regs); > + if (ret) > + return dev_err_probe(dev, ret, "Failed to initialize scp cluster\n"); > + > + return 0; > } > > static int scp_remove(struct platform_device *pdev) > { > - struct mtk_scp *scp = platform_get_drvdata(pdev); > - int i; > + struct list_head *cluster = &cluster_cores; > + struct mtk_scp *scp, *temp; > > - rproc_del(scp->rproc); > - scp_remove_rpmsg_subdev(scp); > - scp_ipi_unregister(scp, SCP_IPI_INIT); > - scp_unmap_memory_region(scp); > - for (i = 0; i < SCP_IPI_MAX; i++) > - mutex_destroy(&scp->ipi_desc[i].lock); > - mutex_destroy(&scp->send_lock); > + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { > + list_del(&scp->elem); > + rproc_del(scp->rproc); > + scp_rproc_free(scp); > + } > > return 0; > } > @@ -1073,12 +1184,19 @@ static const struct mtk_scp_of_data mt8195_of_data_c1 = { > .host_to_scp_int_bit = MT8195_CORE1_HOST_IPC_INT_BIT, > }; > > +static const struct mtk_scp_of_data *mt8195_of_data_cores[] = { > + &mt8195_of_data, > + &mt8195_of_data_c1, > + NULL > +}; > + > static const struct of_device_id mtk_scp_of_match[] = { > { .compatible = "mediatek,mt8183-scp", .data = &mt8183_of_data }, > { .compatible = "mediatek,mt8186-scp", .data = &mt8186_of_data }, > { .compatible = "mediatek,mt8188-scp", .data = &mt8188_of_data }, > { .compatible = "mediatek,mt8192-scp", .data = &mt8192_of_data }, > { .compatible = "mediatek,mt8195-scp", .data = &mt8195_of_data }, > + { .compatible = "mediatek,mt8195-scp-dual", .data = &mt8195_of_data_cores }, > {}, > }; > MODULE_DEVICE_TABLE(of, mtk_scp_of_match); > -- > 2.18.0 >
diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h index c0905aec3b4b..b73b60c22ea1 100644 --- a/drivers/remoteproc/mtk_common.h +++ b/drivers/remoteproc/mtk_common.h @@ -128,6 +128,9 @@ struct mtk_scp { size_t dram_size; struct rproc_subdev *rpmsg_subdev; + + struct list_head elem; + struct list_head *cluster; }; /** diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index 32ecd1450c6f..71882ed31e16 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -30,6 +30,8 @@ struct mtk_scp_of_regs { phys_addr_t l1tcm_phys; }; +static struct list_head cluster_cores; + /** * scp_get() - get a reference to SCP. * @@ -863,7 +865,8 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp) } static int scp_rproc_init(struct platform_device *pdev, - struct mtk_scp_of_regs *of_regs) + struct mtk_scp_of_regs *of_regs, + const struct mtk_scp_of_data *of_data) { struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; @@ -884,7 +887,7 @@ static int scp_rproc_init(struct platform_device *pdev, scp = (struct mtk_scp *)rproc->priv; scp->rproc = rproc; scp->dev = dev; - scp->data = of_device_get_match_data(dev); + scp->data = of_data; platform_set_drvdata(pdev, scp); scp->reg_base = of_regs->reg_base; @@ -934,10 +937,6 @@ static int scp_rproc_init(struct platform_device *pdev, goto remove_subdev; } - ret = rproc_add(rproc); - if (ret) - goto remove_subdev; - return 0; remove_subdev: @@ -952,6 +951,109 @@ static int scp_rproc_init(struct platform_device *pdev, return ret; } +static void scp_rproc_free(struct mtk_scp *scp) +{ + int i; + + scp_remove_rpmsg_subdev(scp); + scp_ipi_unregister(scp, SCP_IPI_INIT); + scp_unmap_memory_region(scp); + for (i = 0; i < SCP_IPI_MAX; i++) + mutex_destroy(&scp->ipi_desc[i].lock); + mutex_destroy(&scp->send_lock); +} + +static int scp_cluster_init(struct platform_device *pdev, + struct mtk_scp_of_regs *of_regs) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev_of_node(dev); + struct platform_device *cpdev; + struct device_node *child; + const struct mtk_scp_of_data **cluster_of_data; + struct list_head *cluster = &cluster_cores; + struct mtk_scp *scp, *temp; + int core_id = 0, num_cores; + int ret; + + child = of_get_next_available_child(np, NULL); + if (!child) + return dev_err_probe(dev, -ENODEV, "No child node\n"); + + of_node_put(child); + if (of_node_name_eq(child, "cros-ec-rpmsg")) { + dev_dbg(dev, "single-core scp\n"); + + ret = scp_rproc_init(pdev, of_regs, of_device_get_match_data(dev)); + if (ret) + return dev_err_probe(dev, ret, "Failed to initialize single-core scp\n"); + + /* the single-core drvdata is intended to be the mtk_scp object. + * the mtk_scp object is used by APIs in mtk_scp_rpmsg_info. + */ + scp = platform_get_drvdata(pdev); + list_add_tail(&scp->elem, cluster); + scp->cluster = cluster; + } else { + dev_dbg(dev, "multi-core scp\n"); + + cluster_of_data = (const struct mtk_scp_of_data **)of_device_get_match_data(dev); + + num_cores = of_get_available_child_count(np); + + for_each_available_child_of_node(np, child) { + if (core_id >= num_cores || !cluster_of_data[core_id]) { + ret = -EINVAL; + dev_err(dev, "Not support core %d\n", core_id); + of_node_put(child); + goto init_fail; + } + + cpdev = of_find_device_by_node(child); + if (!cpdev) { + ret = -ENODEV; + dev_err(dev, "Not found platform device for core %d\n", core_id); + of_node_put(child); + goto init_fail; + } + + ret = scp_rproc_init(cpdev, of_regs, cluster_of_data[core_id]); + if (ret) { + dev_err(dev, "Failed to initialize core %d rproc\n", core_id); + put_device(&cpdev->dev); + of_node_put(child); + goto init_fail; + } + scp = platform_get_drvdata(cpdev); + list_add_tail(&scp->elem, cluster); + scp->cluster = cluster; + put_device(&cpdev->dev); + + core_id++; + } + } + + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { + ret = rproc_add(scp->rproc); + if (ret) + goto add_fail; + } + + return 0; + +add_fail: + list_for_each_entry_continue(scp, cluster, elem) { + rproc_del(scp->rproc); + } +init_fail: + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { + list_del(&scp->elem); + scp_rproc_free(scp); + } + + return ret; +} + static int scp_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -980,21 +1082,30 @@ static int scp_probe(struct platform_device *pdev) scp_regs.l1tcm_phys = res->start; } - return scp_rproc_init(pdev, &scp_regs); + ret = devm_of_platform_populate(dev); + if (ret) + return dev_err_probe(dev, ret, "Failed to populate platform devices\n"); + + INIT_LIST_HEAD(&cluster_cores); + platform_set_drvdata(pdev, &cluster_cores); + + ret = scp_cluster_init(pdev, &scp_regs); + if (ret) + return dev_err_probe(dev, ret, "Failed to initialize scp cluster\n"); + + return 0; } static int scp_remove(struct platform_device *pdev) { - struct mtk_scp *scp = platform_get_drvdata(pdev); - int i; + struct list_head *cluster = &cluster_cores; + struct mtk_scp *scp, *temp; - rproc_del(scp->rproc); - scp_remove_rpmsg_subdev(scp); - scp_ipi_unregister(scp, SCP_IPI_INIT); - scp_unmap_memory_region(scp); - for (i = 0; i < SCP_IPI_MAX; i++) - mutex_destroy(&scp->ipi_desc[i].lock); - mutex_destroy(&scp->send_lock); + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { + list_del(&scp->elem); + rproc_del(scp->rproc); + scp_rproc_free(scp); + } return 0; } @@ -1073,12 +1184,19 @@ static const struct mtk_scp_of_data mt8195_of_data_c1 = { .host_to_scp_int_bit = MT8195_CORE1_HOST_IPC_INT_BIT, }; +static const struct mtk_scp_of_data *mt8195_of_data_cores[] = { + &mt8195_of_data, + &mt8195_of_data_c1, + NULL +}; + static const struct of_device_id mtk_scp_of_match[] = { { .compatible = "mediatek,mt8183-scp", .data = &mt8183_of_data }, { .compatible = "mediatek,mt8186-scp", .data = &mt8186_of_data }, { .compatible = "mediatek,mt8188-scp", .data = &mt8188_of_data }, { .compatible = "mediatek,mt8192-scp", .data = &mt8192_of_data }, { .compatible = "mediatek,mt8195-scp", .data = &mt8195_of_data }, + { .compatible = "mediatek,mt8195-scp-dual", .data = &mt8195_of_data_cores }, {}, }; MODULE_DEVICE_TABLE(of, mtk_scp_of_match);
The difference of single-core SCP and multi-core SCP device tree is the presence of child device nodes described SCP cores. The SCP driver populates the platform device and checks the child nodes to identify whether it's a single-core SCP or a multi-core SCP. Add the remoteproc instances for single-core SCP and multi-core SCP to the new added SCP cluster list. When the SCP driver is removed, it cleanup resources by walking through the cluster list. Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com> --- drivers/remoteproc/mtk_common.h | 3 + drivers/remoteproc/mtk_scp.c | 150 ++++++++++++++++++++++++++++---- 2 files changed, 137 insertions(+), 16 deletions(-)